n. An agent or drug used to cause or induce the expulsion of phlegm from the lungs.
the GNU version of the Collaborative International Dictionary of English
adj. Tending to facilitate expectoration or to promote discharges of mucus, etc., from the lungs or throat.
The Century Dictionary and Cyclopedia
Pertaining to or promoting expectoration.
n. Something, as a drug, which promotes or facilitates expectoration.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
n. a medicine promoting expectoration
Word Usage
"Correctly spelling "expectorant" - and 19 other words - on Sunday won Abington Heights Middle School sixth-grader Sukanya Roy The Times Leader / Scripps NEPA Regional Spelling Bee on Sunday at the Woodlands."